//
//  CaculatorBrain.h
//  Caculator
//
//  Created by Lion User on 03/07/2012.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface CaculatorBrain : NSObject

-(void)pushOperand:(double)operand;
-(double)performOperation:(NSString *)operation;

@property (readonly) id program;

+(double) runProgram:(id)program;
+(NSString*)descriptionOfProgram:(id)program;

@end